Oscae l



(No Model.)

- 0. L. NEISLER.

COMBINED LATCH AND LOOK. I No. 334,887. Patented'Jan. 26, 1886.

\A/ITNEEEEEl TATES llliviren PATENT Prion.

COMBINED LATCH AND LOCK.

.'."3C.LFICATION forming part of Letters Patent No. 334,887, dated January 26, 1886.

Serial No. 160,572. (No model.)

1'0 (tZZ whom, it may concern.-

Be it known that I, OSCAR L. NEIsLER, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Combined Latch and Look, of which the following is a specification.

My invention relates to an improvement in that class of door-latches in which the parts are moved by the force of gravitation.

The object of myimprovementis to provide a door-latch of few parts adapted to be operated by air nob and spi ndle, which latch may be locked in position or used independently of the lock.

The accompanying drawingsdllustrate my invention.

Figure 1 is an elevation showing the position of the parts when used as a latch alone. Fig. 2 is a similar elevation showing the position of the parts when used as a lock.

A is a sliding latclrbolt having lugs b b, which engage the arms of the tumbler 0, through which the knob-spindle passes in the usual manner.

(3 is a bent lever pivoted to the look-case at (1. One arm of said lever engages the sliding latchbolt and the other is weighted, the purpose being to force, the latch outward by the force of gravitation. The latch is drawn inward by the partial rotation of the tumbler e, the inward movement of the latch-bolt raising the weighted arm of the bent lever G.

For the purpose of locking the latch-bolt so as to prevent its inward movement, lever C is provided with a projection, f, which is engaged when the latch-bolt is thrown outward by the gravity catch-bar h. Said catch-bar is pivoted to the lock-case at t, and the disposition of its weight is such that it will assume normally the position shown in Fig. 2, thereby preventing the upward movement of the Weighted arm of lever O. The catch-bar h may be disengaged from lever G by raising its outer end by means of the arm j, which projects through the lock-case, or by means of a key working in the key-hole 7a.

For the purpose of keeping catch-bar it out of engagement with lever 0, when it is desirable to use the latch without looking, a swinging stop, Z, is pivoted to the look-case at m. When the outer end of h is raised so that its hooked end is clearly disengaged from lever O, a projection, n, on the catch is engaged by stop Z. The combined length of the stop Z and the catch-bar from n to the center is a little greater than the distance between the pivots m and 2 so that some force is required to cause the end of stop Z to pass downward past a line drawn from the center of one pivot to the other.

\Vhen it is desired to lock the catch h, so that it cannot be raised by the key. stop Z is swung into the position indicated by dotted lines, Fig. 2.

I-elaim as my invention In a combined latch and lock. the combination,with the lock-case, the sliding bolt A, th weighted lever O,and the gravity catch-bar h,

adapted to engage and to hold in position said lever and having the projection n, of the swinging stop Z,adapted to engage said catchbar, in the manner and for the purpose specified.

OSCAR- L. NEISLER.

Witnesses:

H. P. H001), V. M. H001). 

